Heating apparatus for liquids



June 16, 1931.

D. U. POWELL HEATING APPARATUS FOR LIQUIDS Filed May 1. 1929 2 sheets-sheet 1 1 June 16, 1931. D. u. POWELL HEATING APPARATUS FOR LIQUIDS Filed May l,- 1 29 2 Sheets-Sheet 2 DALTON U'. POWELL Patented June 16, 1931 UNITED STATES PATENT OFFICE DALTON U. POWELL, OF WOODSFIELD, OHIO, ASSIGNOR OF ONE-HALF 'I 'O ORTON C.

DUNN, OF MARIETTA, OHIO HEATING APPARATUS ron. LIQUIDS Application filed May 1,

My invention relates to electrical'heating apparatus for liquids. 7

It isthe object of my invention to provide means of very rapidly heating liquids, particularly volatile liquids, such as oils, by inserting in the liquid in direct contact therewith the heating element through which the current is flowing.

It'is a further object to provide such a heat ing element that may be used with any type of current.

Referring to the drawings:

Figure 1 is an elevation of one side of the heating element of my invention;

Figure 2 is an elevation of the other side;

Figure 3 is a diagrammatic View of the arrangement of the electrical feed wiresof the heating ribbons used as resistances;

Figure 4 is a section on the line 4+4 of Figure 1;

Figure 5 is a section on the line 55 of Figure 1; 1

Figure 6 is a'section on the line 6 6 of Figure 1; 1 I

Figure 7 is a section through a portion of Figure 1 showing the installation of a supv plementary telescoped concentricinsulation support in order to give greater resistance in the ribbon area in the liquid.

Referring to the drawings in detail, 1 is a tubular member of porcelain, or other insulation material, which isprovided with a pair of spiral grooves 2 in which are located a plurality of copper, wires 3 which form, respectively, the positive andinegative sides of a circuit. Such wires are encased in an'insulation of varnished fabric 4. The two cables thus formed are encased in a rubber housing 5. The free ends of these cables enter the bottom of the insulator 1 and thence make their exit in separated condition into the spiral grooves 2 on the outside of the container and then re-enter the hollow interior of the insulator as at 6 where they cross over being held in position by the set screws or screw bolts 7. The free ends are then connected to the resistance ribbons'8 that are wound around portions of the insulator in the grooves 9 through the apertures 10, the

1929. Serial No. 359,435.

insulator being hollow at 11. The hollow end is closed by the plug 12.

Referring to the wiring diagram in F igure 3, the ribbons 8 are connected at their free ends to the split cable 3 which is divided into two parts 3a and 3b. 3a and 36 are connected to the respective ends of the ribbons 8, which ribbons are connected together as at 13 bons constituting the resistance are wound continuously.

These ribbons may be held in position by horizontally disposed retaining bands 15. The inner insulator 14 is spaced from the outer insulator 1 by the spacing studs 15a.

It will be understood that I desire to comprehend Within my invention such modifications as may be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention, whatI claim as new and desire to secure by Letters Patent, is:

1. In an electrical resistance unit, positive and negative electrical supply cables having their ends divided in two spaced parts, a resistance ribbon connected to one of said parts on the positive side to a corresponding part on the negative side, a second resistance ribbon so connected, said respective ribbons beconnection to the supplycables.

2. In an electrical resistance unit,'positive and negative'electrical supply cables having their ends divided in two spaced parts, a resistance ribbon connected to one of said parts on the positive side to a corresponding part on the negative side, a second resistance ribbon so connected, said respective ribbons be-,

ing twisted together adjacent their points of connection to the supply cables, an insulating ing twisted together adj acent' their points of 9 member for supporting a winding of said resistance ribbons.

3. In an electrical resistance unit, a positive and negative supply cable comprising a plurality of fine wires wound together, the ends of each of said cables being divided into two parts, a resistance ribbon connected at its respective ends to a positive and negative part of each cable, a second resistance ribbon ii .i- '1 m 1- m0 conneciet, said iiouons .Jcing MOUIIC together adj acent their points oi connections to the divided ends of the cables.

l. In an electrical re istance unit, a positive and negative supply cable comprising a plurality of line wires wound together, the ends of each of said cables being divided into two parts, a resistance ribbon connected a t its respective ends to a positive and negative part of each cable, asecond resistance ribbon so connected, said ribbons being wound togetl'ier adjacent their points oi' connections to the divided ends of the cables, an insulator adapted to support aid supply cables and loops of the resistance ribbons in spaced condition.

5. In an electrical resistance unit, a positive and negative supply cable comprising a plurality of line wires wound to ther. the ones of each of said cables being d C2 1 ivided into two parts, a resistance ribbon connected at its respective ends to a positive and negative part of each cable, a second resistance ribbon so connected, said ribbons being wound together adjacent their points of connections to the divided ends of the cables, an insulator adapted to support said supply cables and loops of the resistance ribbons in spaced condition, said insulator comprising a hollow body through which liquid can circulate, said resistance ribbon being wound on both sides of said body.

' 6. In an electrical resistance unit, an insulator having end passageways, spiral e2;- terior grooves communicating therewith, a horizontal transverse passageway and longitudinally-disposed passagewa; s communicatin g with a transverse passageway and a spiral passageway, a hollow shell havin a plurality of spaced apertures at either end coininunicating with said passageways.

7. In an electrical resistance unit, an insulator having end passageways, spiral exterior grooves communicating therewith, a horizontal transverse passageway and longitudinal y-disposcd passageways communicating with a transverse passageway and a spiral passageway, a hollow shell having a plurality of spaced apertures at either end communicating with said passageways, a resistance ribbon continuously wound on the exte ior and interior of said shell, and supply cables connected thereto entering the passageways through said insulator and traveling through the grooves and passage ways therein in spaced condition.

8. In an electrical resistance unit, an i11- sulator having end passageways, spiral e1; terior grooves communicating therewith, ahorizontal transverse passageway and longitudinally-disposed passageways co1nnn1nicating with a transverse passageway and a spiral way, a hollow shell having a phrraiity 0L spaced apertures either end coniniunicating with said passageways, a resistanco ribbon continuously wound 011 the or:- terior and interior of said shell, and supply cables connected thereto entering the passageways through said insulator and traveling through the grooves and passage-- ways ther in in spaced condition, and transverse retaining bands on the exterior of said insulat' over said resistance ribbons, and vertically disposed grooves in said insulator for retaining said ribbons in place laterallv.

9. In an elecsri *al resistance unit, an insulater con'iprising a cable supportin base and a hollow resistance ribbon supporting portion having apertures communicating with the hollow interior for the circulation of fluid therein, supply cable having divided ends, re 'illCQ ribbons connected to said respective pc ive and negative supply cables at their divided ones, means for connecting said resistance ribbons adjacent said divided ends.

ii). In an electrical resistance unit, an in sulator comprising cable supporting base and a hollow resistance ribbon supporting portion having apertures communicatin wi -h the hollow interior for the circulation or fluid therein, supply cables having divided ends, resistance ribbons connected to said r-spective positive and negative supply cables at their divided enls, means :for connecting said resistanc ribbons adjacent said divided ends, and a supploinentary concentric resistance insulatin elen'ientmounted within the first mention-ed hollow element in spaced relationship therefrom upon which said resistance ribbons are additionally wound.

11. In an electrical rel'sistance unit, an insulator compr sing a cable supporting base and a hollow resistance ribbon supporting portion having apertures connnunicating with the hollow interior for the ciradation of :tluid tl crein, supply cables having divided ends, resistance ribbons cor noted to said respective positive and negative supply cables at their divided ends, means for connecting said resistance ribbon adjacent said divided enes, and a srppleinentary concentric resistance insulating element mounted ithin the first mention d hollow element inspaced re lationship therefrom upon which said resistance ribbons are additionally wound, and a closure for the end of the hollow interior of said resistance element.

In testimony whereof, I afiix my signature.

DALTON U. POWELL. 

